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� � �� ate. �� � � w � s �� � � l• � >� � <br /> TABLE 1 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE, STOCKTON, CALIFORNIA <br /> Casing Depth Groundwater LPH Concentration (ug/L) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> No Date (feet msl) (feet) (feet ms]) (feet) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> P1 01/30/91 779 3024 -2245 000 -- -- -- -_ <br /> 05/02/91 779 30 13 -2234 000 340 5 430 520 3,700 -- <br /> 07/16-17/91 779 3109 -2330 000 160 <2 5 160 240 3,000 -- <br /> 10/15/91 779 3168 -23 89 000 69 3 4 63 73 1,300 -- <br /> 01/28/92 779 2993 -22 14 000 110 26 270 330 2,000 -- <br /> 04/30/92 779 2956 -2177 000 120 <10 540 600 4,700 -- <br /> 08/13/92 779 31 57 -23 78 000 72 4 5 260 260 2,900 -- <br /> 10/08/92 779 32 17 -2438 000 18 28 52 45 1,I00 -- <br /> 02/23/93 779 2882 -2103 000 66 1 8 200 200 2,300 -- <br /> 05/18/93 779 2746 -1967 000 43 18 290 220 3,200 -- <br /> 08/22/93 779 2772 -1993 000 44 6 9 160 130 1,900 -- <br /> 12/30/93 779 2707 -1928 000 210 52 840 770 7,800 -- <br /> 02/17/94 779 2675 -18 96 000 57 29 250 190 2,300 -- <br /> 05/10/94 779 2641 -1862 000 120 60 450 370 4,800 -- <br /> 08/02/94 779 2787 -2008 000 100 16 310 200 3,200 -- <br /> 11/01/94 779 2820 -2041 000 52 <0 5 160 120 1,700 -- <br /> 02/17/95 779 25 52 -1773 000 80 5 8 300 180 4,000 -- <br /> 05/11/95 779 2295 -15 16 000 55 <5 0 160 110 2,400 -- <br /> 08/24/95 779 2431 -1652 000 <5 0 8 0 350 230 2,900 -- <br /> 10/19/95 779 2478 -1699 000 84 9 7 250 180 2,700 <25 <br /> 02/13/96 779 2252 -1473 000 84 <5 0 230 70 3,300 -- <br /> 04/18/96 779 2070 -1291 000 -- -- -- -- <br /> 08/08/96 779 2141 -1362 000 -- -- __ __ __ <br /> 11/04/96 779 2205 -1426 000 67 <5 0 170 21 2,000 <25 <br /> 02/03/97 779 1750 -9 71 000 -- -- -- -- -- -- <br /> 05/08/97 643 1714 -1071 000 41 2 9 120 48 1,500 71 <br /> a y)mjectsV39425ntasterluplg6U]U942gw As Page 25 of 46 <br />